Swivel chair



y 11, 1933- J. H. MILLER El AL 1,918,190-

SWIVEL CHAIR Filed March 14, 1932 Patented July 11, 19 33 UNITED STATESPATENT OFFICE JOHN H. MILLER, or PLYMOUTH, AND CLIFFORD E. FISH, orneos, INDIANA SWIVEL CHAIR Application. filed March 14, 1932. Serial No.598,686.

This invention relates to a seat or chair in which the lower section isa fixed base or pedestal with the seat rotatively mounted upon it andarranged to return automatically to a predetermined position whenunoccupied. It is designed to be adjustable to face in variousdirections.

This class of chairs is peculiarily useful for seating along eatingcounters and around tables in restaurants, and for seating in any placewhere an inviting and orderly arrangement- .of the seating is of value.

The objects of the improvement are, first to provide a positive andsubstantial arrangement of parts to fix and hold the chair in regard toits facing direction; second, to provide a device in which the facingdirection can he quickly and easily changed; third, to provide a simpleand positive returning mechanism; and fourth, to make an article ofmanufacture that will be efficient and cheap in construction.

The invention is set forth in the following specifications, illustratedin the accompanying drawing, and particularly polnted out in the claims.

In the drawing Fig. 1 is a vertical section from front to back throughthe center of the chair; Fig. 2 is an enlarged section on the line 2 2,of Fig. 3; Fig. 3 is a plan view looking downward with the seat removed;Fig. 4: is a. transverse section on the line 4L 4, of Fig. 2; Fig. 5 isa modified form on the same line as Fig. 4; Fig. 6 is a fragment of thehead of the pedestal in elevation; Fig. 7 is a fragment of the same asFig. 6, but in the modified form.

In the drawing Fig. 1 illustrates a swivel chair showing the threegeneral elements composing it. The pedestal 1, is affixed to asupporting surface. The returning mechanism designated in a general wayas 2, is reinovably and adjustably attached to the top of the pedestal.The seat spider 3, is rotatively mounted upon the returning mechanism 2,and provided with means to return to any position determined by theadjustment of the mechanism 2, carrying the seat 10, afiixed theretowith it. In the enlarged views the operating parts,

bore of the pedestal 1, and is closed at its bottom with a head 2, andat its top with a head 2". The head2, has a stud 4, afiixed to it andextending through an opening in the head 2". The cam 4, is affixed tothe top end of the stud 4'. The head 2", is provided with a bearing 11,in the opening in its central 1 area, and provided with serrations 7,around its periphery as best seen in Fig; 4. The ser-' rations 7 fit thelugs 1, and hold the mechanism 2, from any rotary movement relative tothe pedestal 1. The spider 3,-has a depending shell stud 3, bored torotatably fit the-stud 4', and is provided with the bearing 11, making arevoluble contact with the head 2". The spider 3, is provided with aradial frame 3. The plunger 5,'is mounted in the frame 3", and has a camwheel 5, on its inner end and a spring 5", on its outer end to force thecam wheel 5', against the cam 4. The spring 5", abuts against an outerbar of the frame 3", at its outer end and against a washer held in placeby a pin through the plunger 5, at its inner end. The plunger 5, isslotted in its outer portion and a pin in the frame 3", passes throughthe slot to pre vent the plunger 5, from rotating on its axis.

The spider 3, is attached to the chair seat 10, by bolts through theholes in its radial arms.

A modified form is shown in Fig. 5, and I Fig. 7. Instead of the lugs 1,onthe top of the pedestal 1. it is provided with an annular rim 1",which has on its inside peri hery serrations 8. The head 2, is providewith lugs 9, that fit into the serrations 8, and hold the mechanism fromrotation relative to the pedestal.

The operation of the invention is easy and simple. swivel it around toany direction desired by giving a slight push with the feet on the flooror some statitonary object, or by a slight exertion with the hands incontact with some stationary object. when the seat 10, is vacated Anoccupant of the seat 10, can

the pressure of the spring 5 drives the cam wheel 5, against the cam 4,and returns the spider 3, to the position shown in Fig. 3. To change thefacing position of the seat 10, raise the returning mechanism 2, theheight of the lugs 1, and turn the seat 10, to the de,, sired positionand refit the serrations 7, to the lugs 1, or in the modified form refitthe serrations 8, to the lugs 9. The seat will return automatically tothe position thus determined. Having described our invention, what weclaim is 1. A swivel chair having a hollow pedestal, lugs on the top ofthe pedestal, a bodyremovably fitted into the pedestal, a head at thetop of the body, a'journal bearing formed in an opening in the centralarea of the head,

. serrations formed around the periphery of the head and fitted toengage the lugs, a closureat the bottom of the body, a stud projectingfrom the closure through'the opening in the head, a radial cam affixedto the stud, a seat supporting spider, a seat rigidly attached to the"spider, a shell depending from the spider and rotatively fitted to thestud and journaled on its outside to the head, a

frame rigidly attached to the spider, a plungor movably fitted into theframe, a cam wheel mounted on the inner end of the plunger and inoperative contact with the cam, a pin in the frame engaging a slot inthe outer end of the plunger, an abutment upon the'plunger, and a coilspring around the plunger and bearing against the abutment at one of itsends and bearing against'the frame at its other end.

- 2. In a swivel chair designed to be adjustlected fronting positionincluding a spring :pr'essed member mounted on said chair radial to theaxis of rotation thereof and engaging a cam element rigid with thesupportmg body.

3. Ina swivel chair designed to be adjust able to various frontingpositions and to return to a selected position when vacated, :a hollowpedestal with lugs thereon, an intermediate supporting body withserrations thereon and adjustably fitted to the pedestal by engaging theserrations with the lugs, a

cam rigidly connected to the intermediate body and with its actuatingsurface radial to the axis of the body, a seat supporting spiderjournalled to the intermediate body, and a cam wheel yieldingly mountedupon the spider to'yield radially from the axis of the body and inoperative contact with actuating cam surface. 7 V

In'witness whereof we have hereunto affixed our signatures.

JOHN H. MILLER. CLIFFORD E. FISH.

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